Double chests switch halves when upgrading to 1.13-pre3

The items in the two "halves" of the double chest are swapped when upgrading to 1.13-pre3

Steps to reproduce: -

• Create a world in 1.12.2

• Make a double chest and put an item in the first slot
  

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• Open the world in 1.13-pre3

• Look in the double chest
  

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